Shoppings and Dragons.
The locations and the rates will be posted here for convenience.
When performing rolls for shoppings and dragons, it is 1 roll per item per vendor site. In Example if the team goes to Atlantis and looks for a Greatest Rune Shaving Kit of Atlantis and fails the roll there are no Shaving Kits of Atlantis available at any of the vendors in Atlantis. The roll covers the time it took looking for a safe / reputable vendor, ignoring vendors attempting to con the target, and traps to turn the party into paste.
After 30 Days the players may go back to that vendor site and attempt the roll again, as that has provided time for the vending site to refresh.
Shoppings and dragons rolls doesn't cover custom spell chain TW items, only TW items with a book, page, and price. When a listed creation time for the TW item is present the item will be available after that amount of time has passed.